diff --git a/llvm/lib/Transforms/Utils/MisExpect.cpp b/llvm/lib/Transforms/Utils/MisExpect.cpp
--- a/llvm/lib/Transforms/Utils/MisExpect.cpp
+++ b/llvm/lib/Transforms/Utils/MisExpect.cpp
@@ -185,8 +185,11 @@
   uint64_t TotalBranchWeight =
       LikelyBranchWeight + (UnlikelyBranchWeight * NumUnlikelyTargets);
 
-  assert((TotalBranchWeight >= LikelyBranchWeight) && (TotalBranchWeight > 0) &&
-         "TotalBranchWeight is less than the Likely branch weight");
+  // We cannot calculate branch probability if either of these invariants aren't
+  // met. However, MisExpect diagnostics should not prevent code from compiling,
+  // so we simply forgo emitting diagnostics here, and return early.
+  if ((TotalBranchWeight == 0) || (TotalBranchWeight <= LikelyBranchWeight))
+    return;
 
   // To determine our threshold value we need to obtain the branch probability
   // for the weights added by llvm.expect and use that proportion to calculate